Quick-setting duplex toolholder



Oct 1943- J. LlPANl ,333,021

QUICK-SETTING DUPLEX TOOL HOLDER Filed Dec. 7, 194a 2 Sheets-Sheet 2 ATTORNEY I f orwa d Patented Oct. 26, 1943 UNITED STATES PATENT,

if." 1 P j p $333,021 v t pl 1 amorcsn'rrnsdnoemx 'rooLHoLDaa Jo'srh imam, e b em N. Y;

- pp cat on December 7, 1942,

Serial No. 468,315,

3 This invention relates to a duplex tool holder for use in lathes, planers,"shapers,-etcl-, andan object-ofthis invent-ion is to provide a tool 'holding device whichgis adapted to support in asingle slot two cutting tools used in such machinesand having means for simultaneously clamping both tools in relatively'adjustedpositions so that only oneof the tools will beli moutting fposition', or for simultaneously releasing both tools and with out-removing either of the-tools from the holder;

An object of this invention is to provide a reliei slot in the 15001 holding slot hereby the tool holding slot may be easily cleaned of dirt with a brush, etc., inserted sideways into the tool holding of about 90 degrees and to form one lengthwise ed e o a of ai s w th a ,5 e eeibev andto, position the 'cuttingtools in the slot 50 that the said edges will face each other, whereby the screws may be threaded into the slot seats to wed e the pointed ends against both. beveled edges and to simultaneously clamp both cutting tools against the vertical sides of the slot.

I ;"Another object of this invention is to bend the tool holder into angular form so that the tool holdi as1otwi11 extend hro s n on -0f t e fi t with it el as ne nemen wit thepointed ends of the screws, the remainder portionof the slot-being adapted to 'receivea toolb itof square cross-section and with thebevelled 1 edge in-alinement with the-pointed ends of the screws, whereby upon threading the screws'in-to the slot both tools willbe simultaneously clamped, and upon threading the screws out of theuslotboth toolswill be simultaneously released toipermit either of said tools to beselectively brought i t cut i g position ra d ichlv a d n he tool; hold witho t remo es. either of the tools from the tool holder.

i new oss sectio ma beseated in 1mm alineinent, and to'piovidemeansior clampi the boring. bar or. the cutting; tools inf the tool older; whe eby, a sing e too hol er is ada te I meme e e fi i nwu h as" qegu qiiaall tr ight t rmed and for cutting off the finished product.

e mas. i e na series sides of the ool; ho d r the. said. ot adapted to receive a narrow rectangular Cutting,-

- angular shank extension I 2;

As best shown in Figure 2, the angular exten With the above and other objects in view, the invention will be hereinafter more particularly described and the combination and arrangement of parts will be shown in the accompanying drawings and pointed out in the claims which form part of this specification.

1 Reference will now be hadto the drawings, wherein'lilre numerals of reference designate cor-; responding parts i throughout: the several views, in which: A I

Figure 1 is a top plan view of the tool holder.

Figure 2 is a side elevation of thetool holder shown in Figure l. i

- Figure 3 is an end view of the tool holder.

t Figure 4; is an end viewon an enlarged scale, 'of two coasting cutting tools" having beveledclamping edges; I Figure 5 is afrag-m'entary portion of a modified tool holder, on an enlarged scale- Figure 6 is an end view of aofragmentary por-.

tion oi a modified tool holder "on'an enlarged 1 scale, showing unitary clamping 'means 'for clamping two coacting cutting tools: or for clamps.

ing a boring bar in thetool holder; thefhea'd oi the tool holder being broken awayto show the clamping means, j

Figure 7 is a perspectiveviewoftheclamping means shown in Figure .6. l

Figure 8 is a top plan'view of -a fragmentary portion of the tool holder shown in Figure l,

showing a threadcutting tool supported therein of a bevelled edge l In the illustrated embodiment o-i the invention, the numeral Hlindicates a tool holder comp'r'is. ing a shank ll, of rectangular?crossesection and preferably bent in angular form to provide an sion' l2 has a through slot I 3. "The slot, t3 is longer in horizontal direction in comparison :with its height: One of the vertical sides I41 defining the slot 13. has a relief slot 15. extending from end to end of the slot l3. i

As shown in Figures 1 to 3 inclusive, the slot [3 isadapted t recei e, a -setting+o tool. l6, pr fer ably extendin outward y at both. ends. at the Sim: A ool-tit 'll preferalz y oi uare. oroses t on is adapted o n er into the r mainderr rt m o th slotlii.v

So ket head sc ws, 58 th ad d; n otheiuppe f DON/i011 0f the tool holderlll, areadaptgq; tqmwe vertically into the slot l3. Thesorews- I; have bevelled lower ends [9. For the purpose of 7 without removing clamping the cutting tools I6 and I! in the slot 26 and the cutting tool i] has a similar bevelled upper edge 2| facing the bevelled'edge 20. The angle 22 formed between the bevelled edges 29 and 2i is made to correspond to the angle at the bevelled lower ends of the screws I8.

pose the relief slot I5 permits a brush .to be The relief slot.

inserted sideways into the slot l3. I5 also serves for quickly removing broken tool bits from the slot I3.

a It is to be noted that the tool holder i9 is thus designed for receiving two cutting tools in clamped relation therein and so'that both ofthe cutting tool maybe clampedtherein simultaneously, or both cutting tools may be released simultaneously to permiteither of said coacting tools to ber selectively brought forward into cutting position andquickly clamped in said tool holder either of the said tools fromthe tool holder. 7 v l As shown in Figure 5, there has been provided a modified tool holder 25 having a through slot26, similar to the slot I3. The upper and lower faces defining the slot 26 have V-shaped grooves 21,28,

lengthwise thereof. The grooves are in superposed alinement and arranged so as to be adapted 1 to receive and support the shank of a boring bar 29. Screws 3E! threaded in suitably spaced relation in the lowergportion of the tool holder 25,

' I3, the cutting tool I6 has a bevelled upper edge 7 holder.

serve toclamp .the boringbar 29 in operating 7 position in thetoolh'older 25. A relief slot 3| is provided in the side wall 32, similar to the relief slot I5, in thetoolholder 89. The relief slot 3| is defined by lips-33. I v

It is to'be noted that the tool holder 25 may be used either with the coacting cutting tools I6 and IT, or with the boring ,bar '26. The screws I8 shown in Figure 5 are positioned in the position shown in Figure 1,. that is, in alinement with the ang'le22 and in operatingrelation with the" bevelled edges 20 and"; I i v, r

As shown in Figure 6; there has been provided a modified tool holder 35 having a through slot 96, similar to the'slots I3 and 26 in the tool holders I9 and 25. One'horizontal face defining the slot and 2! of the cutting tools I6 36 has a V-shaped groove 37 lengthwise thereof,.

similar to the V-shapedgroovesin the tool holder For the purpose of clamping the boring bar 29 pointed lower ends I9 of the screws I8 can seat beorithe two co-acting cutting tools I6 and I? along I an extended length thereof there has been'provided a key 39 vertically movably mounted in a portion of the tool holder 35 opposite the groove As best shown in Figure '7, the key 39 has a.

T-shaped slot 40 extending throughout its length. A screw 4 I; havinga T-shaped-"extension 42 at its lower end is adapted toenter into the slot 46. r

The portion of the key 39 opposite the slot '49 has a v shaped groove 43 centrally thereof and'ex- The key 39- also tending throughout' its length. has a beveled edge 44.

It is to be noted that the angle formed between the beveled edge 44 and one of the side faces of the V-shaped groove 43 is of the same number of degrees as the angle 22 between the cutting tools I6 and I1.

It will thus be seen that the tool holder 35 may be used either with the co-acting cutting tools I6 and I! by lowering the key 39 so that the downwardly extending V-shaped edge portion 45 will come in contacting relation with the beveled edges 29 andZI of the cutting tools I6 and IT, to cause simultaneous clamping of said tools in the tool By rotating the screw 4| so as to raise the key 39 away from the said cutting tools, the said tools will be simultaneously released to per mit either of the tools to be selectively brought I portion-of the tool holder 35 when used for very heavy cutting, l have shown'a bar 46 fixed to the said slotted portion by screws '41. It is to be noted that the bar 46 is preferably of rectangular cross-section and is only slightly larger along its width than along its thickness so that as little as possibleof the length of the slot 36 is obstructed. This permits a brush to be inserted into the slot for cleaning it.

Figure 8 shows the tool holder ID having a thread cutting tool 59 set in operating position. A. turning or forming tool 5| is alsoheld in the 'tool holder shown in Figure 8. It is to be noted that while I have shown the thread cutting tool 59 and the screws I8 on the right hand side of the tool holder Ill, thatI may place the thread cutting tool and the screws on the left side of the tool holder. I

'Figur'eQ shows a tool bit I'I similar to the tool bit I1 and modified soflthat a portion of the bevelled upper edge 2! has angular serrations 54. The serrations are of a size so that the bevelled or tween any'two 'coacting serrations. It is to 'be noted that both cutting tools I 6 and I1 have their bevelled edges serrated and so that a screw l8 can be threaded into contacting relation between the tools I6 and I! to positively interlock both of said tools in any desired relatively adjusted relation between said cutting tools. f

It is to be noted that the cutting tools and the tool holders shown herewith are alwaysin hori zontal position which is especially of advantage when cutting threads. A desirable advantage of I the toolholders herewith shown is that they perg mit placing the cutting. tools very closeto the face plate. 1 1 v -In accordanceiwith the patentstatutes I have described and illustrated thepreferr'ed embcdi ments of my invention, but it will e understood that various changes andmodifications can-be made therein without departing from the spirit of Iclaimr' 1. ln'a quick-setting duplex'tool holder, comthe invention as defined by the appended claims.

prising an angular bar of rectangular cross-sec narrow rectangular cutting-oil tool having a bevelled wall and being adapted to enter into said slot, a tool-bit of square cross-section adapted to enter into the remainder portion of said slot and having a bevelled upper edge facing the beveled edge of said cutting-off tool, said screws having bevelled lower ends and being positioned so as to simultaneously clamp both of said cutting tools or to simultaneously release both of said tools to permit either of said tools to be selectively broughtforward into cutting position and quickly clamped in said holder against the sides of said slot without removing either of said tools from said tool holder. t

2. In a quick-setting duplex tool holder, comprising an angularly bent bar of rectangular cross-section, "a through slot in one lengthwise side of said holder, said slot being defined by oppositely facing lips at onevertical face of said holder, the upper portion of said holder having screws threaded therein and movable into said slot, a narrow rectangular cutting-off tool having a beveled upper edge and being adapted to enter into said slot, a tool-bit of square crosssection adapted to enter into the remainder portion of said slot and having a beveled upper edge facing the beveled edge of said cutting-off tool, said screws having beveled lower ends and being positioned intermediate said beveled edges so as to simultaneously clamp both of said tools to permit either of said tools to be selectively brought forward into cutting position and quickly clamped in said holder against the sides of said slot without removing either of said tools from said tool holder.

3. In a quick-setting duplex tool holder, comprising an angularly bent bar of rectangular crosssection, a through slot in one lengthwise side to the remainder portion of said slot and having a bevelled upper edge facing the bevelled upper side of said tool holder, the upper portion of said tool holder having screws threaded therein and movable vertically into said slot, a rectangular cutting-01f tool having a beveled upper edge and being adapted to enter into said slot, a tool-bit of rectangular cross-section adapted to enter into the remainder portion of said slot and having a beveled upper edge facing'the beveled upper edge of said cutting-01f tool, said screws having beveled lower ends and being positioned intermediate said beveled edges so as to simultaneously clamp both of said tools or to simultaneously release both of said tools to permit either of said tools to be selectively brought forward into cutting position and quickly clamped in said tool holder without removing either of said tools cutting-01f tool, said screws having bevelled ends and being positioned intermediate said bevelled edges so as, to simultaneously clamp both of said tools or to simultaneously release both of said tools to permit either of said tools to be selectively brought forward into cutting position and clamped in said tool holder without removing either of said tools from said tool holder.

JOSEPH LIPANI.

edge of said cutting-off tool, said screws having 

